Update MarkdownSharp with latest with PCL changes… …from https://github.com/PKRoma/MarkdownSharp/blob/e0fe9ca6ca53ed85fe21a45b27a5b802c6efaf1a/MarkdownSharp/Markdown.cs.
Update MarkdownSharp with latest with PCL changes…
…from https://github.com/PKRoma/MarkdownSharp/blob/e0fe9ca6ca53ed85fe21a45b27a5b802c6efaf1a/MarkdownSharp/Markdown.cs.

patridge/MarkdownSharp.Portable